A man who was drunk when he ran down his ex-girlfriend's husband following a Halloween night of bar hopping was sentenced Monday to less than two years in jail by a judge who said he wasn't sure whether he was handing down the punishment to Dr. Jekyll or Mr. Hyde.

Jason Kasper, of Bethel Park, was sentenced to 11½ to 23 months in jail followed by five years' probation. He had pleaded guilty in February to charges of homicide by vehicle, involuntary manslaughter and drunken driving in the death of 49-year-old John Pavlick on Nov. 1, 2009.

The 37-year-old Kasper had dated the victim's wife, Tracy Pavlick, while the Pavlicks were separated. After they reconciled, the couple went drinking Halloween night and Tracy Pavlick invited Kasper to join them. After the couple went home, Kasper went to Pavlick residence uninvited a short time later to ask Tracy Pavlick if she would reconsider and leave her husband.

Kasper and Pavlick wound up fighting in the yard before Kasper drove his car onto John Pavlick, crushing him.

Kasper told Allegheny County Judge David Cashman that drugs and alcohol change his behavior. "When I'm using those substances, I'm not the same person," Kasper said.

"That's the most disturbing thing to me," Cashman answered. "Obviously alcohol fueled what was going on that night."

"I don't know who I'm sentencing today: Dr. Jekyll or Mr. Hyde," he added, referring to the tale of a mild-mannered scientist who take a potion that turns him into a maniac.

Pavlick's family argued that the sentence was too short.

"Eleven months just does not seem right for everything he took away," said John Pavlick's sister, Sharon Kraus, of Charlotte, N.C. "That man had every opportunity to drive away that night."